Current Sensing Transformers (CT)

  • Current Sensing Transformers Current Sensing Transformers
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Our standard Current Sensing Transformers include window sizes up to 350 square inches with current ratings up to 10,000A and current ratios from 10:1 to 6000:5. Select models are UL recognized for indoor applications.  See the selection table below for more details.

Advantages of using Bicron Current Sensing Transformers:
  • Low cost AC current sensing
  • Electrically isolated output
  • No external power requirements
  • Safety recognitions
  • Simple electronic interface
  • Small size and weight
  • PCB mounting
  • Extreme reliability
  • High linearity & repeatability
Bicron’s proven standard Current Sensing Transformer designs are great starting points for new application requirements. Our “modified standard” program permits us to substantially modify our standard electrical and mechanical specifications without incurring the cost of new product development. This allows you to quickly optimize your system at lower cost with our proven technology.

50Hz to 60Hz 3-phase high voltage power harvesting & current sensing transformer assembly. Used for switchgear, power distribution monitoring.  Custom Current Transformers
Our custom Current Transformer designs are developed to meet unique customer applications.  Our extensive experience includes custom models for high voltage applications such as power distribution sensing and power harvesting. We also offer value-added assembly.  
Please use our Current Transformer Design Worksheet to describe your application requirements for a Bicron modified standard or custom designed Current Transformer.

50Hz to 60Hz 3-phase high voltage power
harvesting & current sensing transformer assembly.
Used for switchgear, power distribution monitoring.

Visit our Technical Guide for Current Transformers webpage which provides fundamentals for Current Transformer design including technical terminology.
Selection of Core Materials and Models
Our preferred core material for standard current sensing transformers is Bicron’s Special Permeability (SP), with proven performance features for accuracy, linearity, low-end resolution and temperature sensitivity.  We also offer current sensing transformers made with Grain Oriented Silicon Steel (GOSS), providing good performance at a lower cost.  Bicron’s preferred SP and GOSS materials offer advantages over other typical core materials as represented in the following comparison chart:

Core material considerations:
Preferred Core Materials Advantages
 Special Permeability (SP)  Improved performance over wide temp; -35°C - +80°C
 Improved low level performance after exposure to DC shock
 Minimal Phase Angle (Iprimary VS Isecondary) typically less than 1%
 Excellent coupling of primary and secondary currents
 Grain Oriented Silicon Steel (GOSS)  Provides high output voltages suitable for self-powered sensing


Bicron Current Sensing Transformers - Selection Guide     click here to view as pdf

Measurement: inches (mm)     Data subject to change    *UL recognized for indoor applications         Links for Datasheets appear if available

Pinout Options:

Bicron Current Sensing Transformers Performance Characteristics (click here to view PDF):


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